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Halogen-free flame-proof resin composition and preparation method thereof

A technology of flame retardant resin and composition, applied in the field of polymer composition, can solve the problem of product smoothness, water absorption rate is not satisfactory, flame retardant affects the use and appearance of products, phosphate ester flame retardant has low phosphorus content and other problems, to achieve the effect of good chemical stability, beautiful appearance and smooth hand feeling

Active Publication Date: 2009-07-08
WEIFANG QIANYUAN PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low phosphorus content of the phosphate flame retardant used, a certain amount must be added to achieve the flame retardant effect required by the wire and cable, so the flame retardant is easily precipitated from the surface of the product
Causes the surface of the product to be sticky and easy to get dusty
The precipitation of the flame retardant not only affects the use and appearance of the product, but more seriously, it will also reduce the waterproof performance of the composition and affect the electrical properties.
In addition, in this composition, the olefin elastomer newly developed in recent years is also used. Although it has excellent balance, due to the influence of various factors such as processing performance, the smoothness of the molded product, water absorption, etc. Neither is satisfactory
Moreover, the manufacturing cost is also greatly increased

Method used

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  • Halogen-free flame-proof resin composition and preparation method thereof
  • Halogen-free flame-proof resin composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The halogen-free flame-retardant resin composition is used to prepare materials suitable for soft wire and cable coverings, power cord injection molding plugs, and the like. The raw materials of the composition can be purchased directly from the market, and Table 1 lists in detail the grades and manufacturers of some compositions that can be selected for use in the present invention.

[0013] Table 1: Brands and manufacturers of compositions

[0014]

Embodiment 2

[0016] A power cord injection molding plug material is prepared by using a halogen-free flame-retardant resin composition. Put the following components into a high-speed mixer: 1-15% by weight of polyethylene, 15-50% by weight of modified polyphenylene ether, 15-45% by weight of hydrogenated styrene-butadiene block copolymer, and halogen-free resistor Fuel. The halogen-free flame retardant is a mixture of microencapsulated coated red phosphorus and nitrogen-based flame retardant, wherein, 1-10% by weight of coated red phosphorus, 5-20% by weight of nitrogen-based flame retardant and 5-28% by weight Processing aids. After dispersion and mixing, it is melted, extruded, cooled, pelletized, dried and packaged through a twin-screw extruder. The preparation process is simple and continuous, the production efficiency is high, and the product quality is stable. The prepared plug material has good heat resistance and flame retardancy, excellent electrical insulation and strong wear ...

Embodiment 3

[0021] Using the halogen-free flame-retardant resin composition, a wire and cable covering material with a wire specification of 1.38*2.80mm is prepared. The proportion of the composition is: 4-12% by weight of high-density polyethylene, 30-45% by weight of modified polyphenylene ether, 18-30% by weight of hydrogenated styrene-butadiene block copolymer, 1- 4% by weight of coated red phosphorus, 9-14% by weight of nitrogen-based flame retardant and 9-21% by weight of processing aids. After testing, the performance indicators of the product are excellent, see Table 4 for details.

[0022] Table 4: Physical properties and test methods of the wire

[0023] Test items performance standard test Tensile strength MPa 15.50～21.00 UL1581 Elongation % 100～230 UL1581 Hardness Shore A 92～97 GB / T 2411 Density g / cm 3 1.10 GB / T1033 Flame retardant class VW-1 pass UL1581

[0024]

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Abstract

The invention discloses a halogen-free flame-retardant resin composition, including polyethylene (PE), modified polyphenylene oxide (MPPO), hydrogenated styrene-butadiene block copolymer (SEBS) and a halogen-free flame retardant , a mixture of non-halogenated red phosphorus, nitrogen-based flame retardants and processing aids. During preparation, the mixture of polyethylene, modified polyphenylene ether, hydrogenated styrene-butadiene block copolymer, microencapsulated coated red phosphorus and nitrogen-based flame retardant is put into a high-speed mixer by weight %, dispersed and mixed Finally, it is melted, extruded, cooled, pelletized, dried and packaged by a twin-screw extruder. The mixture of the invention is suitable for the production of various soft and semi-hard products, such as: coverings for electric wires and cables, injection molded plugs for power cords, etc. The processing flow of the invention is simple and continuous, the production efficiency is high, the cost is low, and the product quality is stable. The product made by the composition of the invention has beautiful appearance, smooth surface and no precipitates.

Description

Technical field [0001] The invention relates to a polymer composition, in particular to a halogen-free flame-retardant resin composition and a preparation method thereof. Background technique [0002] With the continuous development of science and technology, the application range of resin compositions is becoming wider and wider. At the same time, higher requirements are put forward for their corresponding chemical and physical properties, such as: flame retardancy, chemical resistance, heat resistance Sex, impact resistance, softness, electrical properties and good environmental performance, etc. [0003] In order to improve the chemical properties of the composition, Chinese patent CN1711317A discloses a "resin composition for wire and cable covering materials", which includes polyarylene ether resin, syndiotactic polystyrene, olefinic elastomer , hydrogenated styrene-butadiene block copolymer and phosphate ester halogen-free flame retardants. Although the composition h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L71/12C08L53/02C08K5/3492B29B9/12H01B7/295
Inventor 王震李鸿成王倜
Owner WEIFANG QIANYUAN PLASTIC
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